| 摘要 |
A method wherein a series of common mid-point seismic traces are produced in which the common mid-point (CMP) is a predetermined point, and the traces in the series are processed by normal-moveout and/or static correction. The method is characterised in that the series of traces related to the predetermined point (A) is achieved by recording four sub-series of CMP traces related to said predetermined point in four angular directions (1-4) that pass therethrough, and normal-moveout and/or static corrections are performed on each of the four sub-series of CMP traces to determine, for each sub-series, a curvature and/or velocity value which optimises the power of the sum of the traces in the corrected sub-series of interest. The four resulting values indicate the components of the velocity field sought for each of the reflective elements corresponding to the predetermined point, and characterised by a vertical propagation time t0, with reflection, for zero deflection. The method is particularly useful for exploring tectonically complex media.
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